#ifndef __ASM_PARAVIRT_H
#define __ASM_PARAVIRT_H
/* Various instructions on x86 need to be replaced for
* para-virtualization: those hooks are defined here. */
#include <linux/linkage.h>
#ifdef CONFIG_PARAVIRT
#ifndef __ASSEMBLY__
struct thread_struct;
struct Xgt_desc_struct;
struct tss_struct;
struct paravirt_ops
{
unsigned int kernel_rpl;
int paravirt_enabled;
const char *name;
void (*arch_setup)(void);
char *(*memory_setup)(void);
void (*init_IRQ)(void);
void (*banner)(void);
unsigned long (*get_wallclock)(void);
int (*set_wallclock)(unsigned long);
void (*time_init)(void);
/* All the function pointers here are declared as "fastcall"
so that we get a specific register-based calling
convention. This makes it easier to implement inline
assembler replacements. */
void (fastcall *cpuid)(unsigned int *eax, unsigned int *ebx,
unsigned int *ecx, unsigned int *edx);
unsigned long (fastcall *get_debugreg)(int regno);
void (fastcall *set_debugreg)(int regno, unsigned long value);
void (fastcall *clts)(void);
unsigned long (fastcall *read_cr0)(void);
void (fastcall *write_cr0)(unsigned long);
unsigned long (fastcall *read_cr2)(void);
void (fastcall *write_cr2)(unsigned long);
unsigned long (fastcall *read_cr3)(void);
void (fastcall *write_cr3)(unsigned long);
unsigned long (fastcall *read_cr4_safe)(void);
unsigned long (fastcall *read_cr4)(void);
void (fastcall *write_cr4)(unsigned long);
unsigned long (fastcall *save_fl)(void);
void (fastcall *restore_fl)(unsigned long);
void (fastcall *irq_disable)(void);
void (fastcall *irq_enable)(void);
void (fastcall *safe_halt)(void);
void (fastcall *halt)(void);
void (fastcall *wbinvd)(void);
/* err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */
u64 (fastcall *read_msr)(unsigned int msr, int *err);
int (fastcall *write_msr)(unsigned int msr, u64 val);
u64 (fastcall *read_tsc)(void);
u64 (fastcall *read_pmc)(void);
void (fastcall *load_tr_desc)(void);
void (fastcall *load_gdt)(const struct Xgt_desc_struct *);
void (fastcall *load_idt)(const struct Xgt_desc_struct *);
void (fastcall *store_gdt)(struct Xgt_desc_struct *);
void (fastcall *store_idt)(struct Xgt_desc_struct *);
void (fastcall *set_ldt)(const void *desc, unsigned entries);
unsigned long (fastcall *store_tr)(void);
void (fastcall *load_tls)(struct thread_struct *t, unsigned int cpu);
void (fastcall *write_ldt_entry)(void *dt, int entrynum,
u32 low, u32 high);
void (fastcall *write_gdt_entry)(void *dt, int entrynum,
u32 low, u32 high);
void (fastcall *write_idt_entry)(void *dt, int entrynum,
u32 low, u32 high);
void (fastcall *load_esp0)(struct tss_struct *tss,
struct thread_struct *thread);
void (fastcall *set_iopl_mask)(unsigned mask);
void (fastcall *io_delay)(void);
void (*const_udelay)(unsigned long loops);
/* These two are jmp to, not actually called. */
void (fastcall *irq_enable_sysexit)(void);
void (fastcall *iret)(void);
};
extern struct paravirt_ops paravirt_ops;
#define paravirt_enabled() (paravirt_ops.paravirt_enabled)
static inline void load_esp0(struct tss_struct *tss,
struct thread_struct *thread)
{
paravirt_ops.load_esp0(tss, thread);
}
#define ARCH_SETUP paravirt_ops.arch_setup();
static inline unsigned long get_wallclock(void)
{
return paravirt_ops.get_wallclock();
}
static inline int set_wallclock(unsigned long nowtime)
{
return paravirt_ops.set_wallclock(nowtime);
}
static inline void do_time_init(void)
{
return paravirt_ops.time_init();
}
/* The paravirtualized CPUID instruction. */
static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
unsigned int *ecx, unsigned int *edx)
{
paravirt_ops.cpuid(eax, ebx, ecx, edx);
}
/*
* These special macros can be used to get or set a debugging register
*/
#define get_debugreg(var, reg) var = paravirt_ops.get_debugreg(reg)
#define set_debugreg(val, reg) paravirt_ops.set_debugreg(reg, val)
#define clts() paravirt_ops.clts()
#define read_cr0() paravirt_ops.read_cr0()
#define write_cr0(x) paravirt_ops.write_cr0(x)
#define read_cr2() paravirt_ops.read_cr2()
#define write_cr2(x) paravirt_ops.write_cr2(x)
#define read_cr3() paravirt_ops.read_cr3()
#define write_cr3(x) paravirt_ops.write_cr3(x)
#define read_cr4() paravirt_ops.read_cr4()
#define read_cr4_safe(x) paravirt_ops.read_cr4_safe()
#define write_cr4(x) paravirt_ops.write_cr4(x)
static inline unsigned long __raw_local_save_flags(void)
{
return paravirt_ops.save_fl();
}
static inline void raw_local_irq_restore(unsigned long flags)
{
return paravirt_ops.restore_fl(flags);
}
static inline void raw_local_irq_disable(void)
{
paravirt_ops.irq_disable();
}
static inline void raw_local_irq_enable(void)
{
paravirt_ops.irq_enable();
}
static inline unsigned long __raw_local_irq_save(void)
{
unsigned long flags = paravirt_ops.save_fl();
paravirt_ops.irq_disable();
return flags;
}
static inline void raw_safe_halt(void)
{
paravirt_ops.safe_halt();
}
static inline void halt(void)
{
paravirt_ops.safe_halt();
}
#define wbinvd() paravirt_ops.wbinvd()
#define get_kernel_rpl() (paravirt_ops.kernel_rpl)
#define rdmsr(msr,val1,val2) do { \
int _err; \
u64 _l = paravirt_ops.read_msr(msr,&_err); \
val1 = (u32)_l; \
val2 = _l >> 32; \
} while(0)
#define wrmsr(msr,val1,val2) do { \
u64 _l = ((u64)(val2) << 32) | (val1); \
paravirt_ops.write_msr((msr), _l); \
} while(0)
#define rdmsrl(msr,val) do { \
int _err; \
val = paravirt_ops.read_msr((msr),&_err); \
} while(0)
#define wrmsrl(msr,val) (paravirt_ops.write_msr((msr),(val)))
#define wrmsr_safe(msr,a,b) ({ \
u64 _l = ((u64)(b) << 32) | (a); \
paravirt_ops.write_msr((msr),_l); \
})
/* rdmsr with exception handling */
#define rdmsr_safe(msr,a,b) ({ \
int _err; \
u64 _l = paravirt_ops.read_msr(msr,&_err); \
(*a) = (u32)_l; \
(*b) = _l >> 32; \
_err; })
#define rdtsc(low,high) do { \
u64 _l = paravirt_ops.read_tsc(); \
low = (u32)_l; \
high = _l >> 32; \
} while(0)
#define rdtscl(low) do { \
u64 _l = paravirt_ops.read_tsc(); \
low = (int)_l; \
} while(0)
#define rdtscll(val) (val = paravirt_ops.read_tsc())
#define write_tsc(val1,val2) wrmsr(0x10, val1, val2)
#define rdpmc(counter,low,high) do { \
u64 _l = paravirt_ops.read_pmc(); \
low = (u32)_l; \
high = _l >> 32; \
} while(0)
#define load_TR_desc() (paravirt_ops.load_tr_desc())
#define load_gdt(dtr) (paravirt_ops.load_gdt(dtr))
#define load_idt(dtr) (paravirt_ops.load_idt(dtr))
#define set_ldt(addr, entries) (paravirt_ops.set_ldt((addr), (entries)))
#define store_gdt(dtr) (paravirt_ops.store_gdt(dtr))
#define store_idt(dtr) (paravirt_ops.store_idt(dtr))
#define store_tr(tr) ((tr) = paravirt_ops.store_tr())
#define load_TLS(t,cpu) (paravirt_ops.load_tls((t),(cpu)))
#define write_ldt_entry(dt, entry, low, high) \
(paravirt_ops.write_ldt_entry((dt), (entry), (low), (high)))
#define write_gdt_entry(dt, entry, low, high) \
(paravirt_ops.write_gdt_entry((dt), (entry), (low), (high)))
#define write_idt_entry(dt, entry, low, high) \
(paravirt_ops.write_idt_entry((dt), (entry), (low), (high)))
#define set_iopl_mask(mask) (paravirt_ops.set_iopl_mask(mask))
/* The paravirtualized I/O functions */
static inline void slow_down_io(void) {
paravirt_ops.io_delay();
#ifdef REALLY_SLOW_IO
paravirt_ops.io_delay();
paravirt_ops.io_delay();
paravirt_ops.io_delay();
#endif
}
#define CLI_STRING "pushl %eax; pushl %ecx; pushl %edx; call *paravirt_ops+PARAVIRT_irq_disable; popl %edx; popl %ecx; popl %eax"
#define STI_STRING "pushl %eax; pushl %ecx; pushl %edx; call *paravirt_ops+PARAVIRT_irq_enable; popl %edx; popl %ecx; popl %eax"
#else /* __ASSEMBLY__ */
#define INTERRUPT_RETURN jmp *%cs:paravirt_ops+PARAVIRT_iret
#define DISABLE_INTERRUPTS pushl %eax; pushl %ecx; pushl %edx; call *paravirt_ops+PARAVIRT_irq_disable; popl %edx; popl %ecx; popl %eax
#define ENABLE_INTERRUPTS pushl %eax; pushl %ecx; pushl %edx; call *%cs:paravirt_ops+PARAVIRT_irq_enable; popl %edx; popl %ecx; popl %eax
#define ENABLE_INTERRUPTS_SYSEXIT jmp *%cs:paravirt_ops+PARAVIRT_irq_enable_sysexit
#define GET_CR0_INTO_EAX call *paravirt_ops+PARAVIRT_read_cr0
#endif /* __ASSEMBLY__ */
#endif /* CONFIG_PARAVIRT */
#endif /* __ASM_PARAVIRT_H */
